
//光标放在最后 $("#文本框ID").textFocus();光标放在第二个字符后面 $("#文本框ID").textFocus(2);
(function ($) {
    $.fn.textFocus = function (v) {
        var range, len, v = v === undefined ? 0 : parseInt(v);
        this.each(function () {
            if ($.browser.msie) {
                range = this.createTextRange();
                v === 0 ? range.collapse(false) : range.move("character", v);
                range.select();
            } else {
                len = this.value.length;
                v === 0 ? this.setSelectionRange(len, len) : this.setSelectionRange(v, v);
            }
            this.focus();
        });
        return this;
    }
})(jQuery);